Computer, overlay processor and method for performing overlay processing
US6369826B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/125
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To enable a moving image to be clearly displayed on a hold-type of a display, such as a liquid crystal display, by setting a shutter function in an overlay processor, a computer having a display for displaying a moving image includes a memory with an on-screen area for storing display image information and an off-screen area for storing image information of the moving image. The on-screen area includes a memory area used as a display area of the moving image and which stores predetermined key color information. A data reading circuit reads the display image information from the on-screen area and the image information of the moving image from the off-screen area, and a shutter circuit outputs the image information of the moving image from the data reading circuit or predetermined color information by a predetermined frame. A key color detecting circuit determines whether the read display image information is the key color information or not, and a selector circuit outputs an image signal corresponding to the display image information to the display if the read display image information is not the key color information, and outputting a signal corresponding to an output of the shutt…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.